CELL

Published on: Author: Johny Thomas

All living things are made up of cells. They are the basic structural and functional units of life. Robert Hooke discovered the cell in 1665. The average size of a cell varies between 10 micrometers (µm) to 150 micrometers (µm). The simplest living organisms are made up of one cell only. These organisms are described… Continue reading

MESENTERY A new organ in Human

Published on: Author: Johny Thomas

  New organ discovered inside human body by scientists   A new organ called mesentery has been discovered inside the human body. It was previously thought to be just a few fragmented structures in the digestive system. The scientists have realized it is in fact one, continuous organ. Now we have 79 organs in our body The functions of mesentery are… Continue reading

HUMAN DIGESTIVE SYSTEM

Published on: Author: Johny Thomas

The digestive system also known as the alimentary canal or gut is a long tube running from the mouth to the anus, with associated organs together with a number of associated glands that help in digestion. The human digestive system is well adapted for digestion and absorption. Digestion is the process by which insoluble, in… Continue reading

DIFFUSION, OSMOSIS,AND ACTIVE TRANSPORT

Published on: Author: Johny Thomas

DIFFUSION Diffusion is the movement of molecules from a region of high concentration to a region of low concentration down a concentration gradient until evenly distributed.Concentration gradient: the difference in concentration between two regions. Why does diffusion occur? 1. There is a great deal of empty space between molecules of all substances. (The spaces are… Continue reading

AIR POLLUTION BY GREEN HOUSE GASES (CARBON DIOXIDE AND METHANE) CONTRIBUTING TO GLOBAL WARMING.

Published on: Author: Johny Thomas

GLOBAL WARMING The atmosphere is trapping too much heat and causing the earth to heat up. This is known as GLOBAL WARMING. GREEN HOUSE GASES Carbon dioxide , Methane ,Nitrous oxide ,CFCs etc are called ‘green house gases’. These gases form a layer in the atmosphere and this layer acts like glass in the ‘green… Continue reading